My favorite mission in Blood Money! My method:
Stop at the counter for the keycard, take the elevator up to the floor (I may or may not stop at the bar to get the Schmutz’s room info first). Climb through the back window and up to the next floor, knock out the staff member and take the master keycard for the floor. Go to the elevator Schmitz will take and wait for him to get in. Fiber wire him, take is clothes (maybe his gun, depending on how I want to do this). Go back to 8th floor, activate fire alarm across from the scientists room, wait for everyone to clear out and then enter his room, put Silverballer (or Schmutz’s gun) into the briefcase, go down to Schmutz’s room and grab the briefcase, put a bomb inside it. Go down and meet the Shiek, let the briefcase swap take place, pull out the pistol and shoot him in the head, go back to the elevator and climb up to change back into the suit (leave Schmutz’s gun if taken before), and exit with the diamonds briefcase after the scientist triggers the bomb in the other briefcase. Exit.
It’s a really cool level, especially when performed in this way or a similar way if you like the story and more, as I do, because if you use Schmutz’s gun instead of your own, but do everything else here (or kill Schmutz in his room instead of atop the elevator), then story-wise, the authorities will trace the bullet in the Sheik’s head to Schmutz’s gun, and will assume that he killed the Sheik and the scientist, and that one of the Sheik’s people killed Schmutz in retaliation. Case closed, total 47 move. Plus, also following along with the games’s story, if you put the bomb in the DNA briefcase, it destroys the DNA samples so they can’t be used to make clones.
Love this level, one of my favorites of the whole series.